Internal-combustion engine.



A. L. P. GUERET. INTERNAL coMBUsTloN ENGINE.

APPLICATION FILED FEBJI, 1913.

Patented Nov. 3, 1914.

@www

ANDR LEON PIERRE GUERET, oF PARIS, FRANCE.

INTERNAL-COMBUSTION ENGINE.

1,1ie,.eee.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application led February 11, 1913. Serial No. 747,776.

To all whom it may concern:

Be it known that I, ANDR LoN Pmnnn GUERET, a citizen of the French Republlc. residing in Paris, France, have lnvented certain new and useful Improvements 1n In* ternal-Combustion Engines, of whlch the following is a specification.

This invention relates to internal combustion engines of that general type wherein a sleeve which functions as a valve is interposed between 'the cylinder and piston and is continuously rotated during the operation of the engine to positively govern the admission and the exhaust.

The present invention provides an iin-1 proved relation between the valve sleeve? aforesaid and the piston whereby at the mo ment of ignition, and during a short initial portion of the ignition stroke, the port in; the valve sleeve iis covered by the pistom notwithstanding that said valve sleeve is in position to cut O' the communication between `the interior of the cylinder and the* inlet zport. The object of this relation is to; provide against any escape of gas between, said sleeve and the cylinder at the time when the pressure inthe cylinder is greatest, ag result which would otherwise obtain were@ the port in the valve sleeve uncovered at thef time `referred to.

yIn combination with the feature above rel tion of the piston according to which the piston `is provided adjacent its working face with a recess which establishes communica tion between the respective inlet and exhaust portsand the portion of the cylinder above the working 'face of the piston, during the periods when the said working face is at an elevation above the elevation of said inlet and exhaust ports. The object of this fea ture is to permit the explosive mixture to enter the cylinder at the very beginning of the inlet stroke and to permit the exhaust gases to escape from the cylinder even to the absolute end of the exhaust stroke.

.'Embodiments of the invention are illustrated in the accompanying drawings wherein:

Figures 1 and 2 are vertical and .horizontal sectional views of an engine in which the principal -feature of the invention, as

above pointed out, is incorporated, the plane of Fig. 1 being indicated on the line 1- -1of Fig. 2, and the plane of Fig. 2 being indicated on the line 2 2 of Fig. 1; Figs. 3 and 4 are vertical and horizontal sectional views showing an engine having the same features of construction as the engine shown in Fig. l, but wherein the piston is provided with the recess above referred to. The lplane of Fig. 3 is indicated by the line 3-3 of Fig. 4, and the plane of Figa is indicated by the line 4-4 of Fig. 8; Figs. 5 and 6 are views similar to Figs. 3 and 4, respectively, and showing the same engine which is shown `in Figs. 3 and 4 but with the ,parts thereof in exhaust position, Fig. 5 being in a plane which is taken on the line 5--5 of Fig. 6, and Fig. 6 being in a plane which .is `taken on the line 6-6 of Fig. 5; Fig. 7 is a vertical sectional view illustrating an engine in which the .features of the invention are incorporated and in which the cylinder is provided at its lower end with an auxiliary exhaust port. The plane of this gure is indicated by the line 7-7 of Fig. 8; Figs. 8 and 9 are horizontal sectional views on the lines 8-8 and 9-9 of Fig. 7.

Similar characters of reference designate corresponding parts throughout the several views.

The engine includes a cylinder a which is provided at an elevation lower than that of the operative face of the piston b at the end of an up stroke of said piston, with a pair of ports d and e, the port d serving as an inlet port and the port e serving as an exhaust port. The flow of gas through the ports al and e is controlled by a cylindrical valve c which is fitted concentrically within the cylinder a, extending the length thereof,

and of course surroundin the piston b. The valve c is provided wit a port c and is continuously rotated during the operation ically brought into register with the respecltive ports al and e.

`shaft of the engine and is driven by chain and sprocket gearing from said crank shaft,

of the engine whereby the port c is periody and a worm wheel which circumscribes the l.

lower portion of the valve c and is driven by said worm shaft. lt will be understood that the sleeve o vis rotated at half the speed of the crank shaft. v

The support for the valve @preferably comprises a collar 1 which is secured by bolts 2 to the base of the cylinder a and, provides an abutment or ledge to take' Vthethrust of the lower end of the valve c, ball bearings 3 being preferably interposed between the collar 1 and the said lower end of the valve -0 and other ball bearings 4 being preferably linterposed between said valve and an adioining annular shoulder formed internally and at the lower end of the'cylinder a.

The construction shown in Figs. 3 to 6 embodies the same principles of structure and operation as the construction shown in F ig. 1, differing, however, in that the piston is provided at one side thereof with a recess '6 which extends to the upper or working face of said piston and permits of communication between the space above said upper or working face and the respective ports d and e, even in the uppermost posi tions of said piston when its working face is at an elevation above the elevation of said ports. By virtue of the provision of the recess 5, when 'the port 7c registers with the port d, the explosive mixture may enter the cylinder even at the very beginning of the suction stroke andwhen the port lo alines with the port e the exhaust gases may escape from the cylinder even to the absoluteend of the exhaust stroke. Y

By reference to Fig. 2, it will be observed that the portion of the cylinder a which extends between the ports d and e is but very slightly longer than the port 7c. It follows that the interval between the completion of the exhaust stroke and the commencement of the suction stroke is of such short duration asto be negligible in so far as any interference with the eiiicient operation of the engine is concerned. y

The operation of the engine will be readily apparent from the foregoing description. It should be noted, however, that in most engines involving the four-cycle principle of operation, the moment of ignition occurs during the latter part of the compression stroke of the piston and that from such moment the pressure produced by the ignition progressively increases, attaining a maximum degree, however, after the piston has commenced what is commonly termed the ignition or power stroke. As above pointed out, the ports al and e, and consequently the port which alines therewith, are at an elevation which is below the elevation of the upper or working face of tbe piston, inthe uppermost position of said piston. By virtue of this feature of arrangement, and in consideration of the fact that the moment of ignition occurs during arianne thelatter part of the compression stroke of the piston, the port Za' is covered at least during the said moment of ignition and is maintained covered throughout a short vinitial portion of the ignition or power stroke, and during' such period that the port it is maintained covered, the pressure developed consequent to the ignition obtains itsdmazrimum degree and commences to rece er Figs. i', S and 9 illustrate an engine embodying the features of construction lelnbodied in the engine shown in Fig. 1 and having the added feature of an auxiliary eX- haust passage which includes a port e @a formed in the lower portion of the cylinder cz and a port 76 formed inv the"lowerportion of the sleeve c, and in the course of the rotation of said sleeve, periodicaly brought into register with the port c". The ports e" g5 and 10 are arranged at an elevation above the working face of the piston in the lowermost position of said piston and the location of the port a" is so selected that said port comes into register with the port e", before ,im the port 7c comes into register with the port e, in order to insure a relatively large veX- haust area at the beginning of the exhaust stroke, and, .if desired, to permit of the inception of theexhaust immediately upon @5 the completion of the power stroke.

Having fully described my invention, l claim:

1. ln an internal combustion engine, in combination, a cylinder, a piston working my@ therein, a cylindrical valve arranged concentrically in the cylinder and in surrounding relation to the piston, and means for continuously rotating the valve during the normal operation of the engine, the cylin- 15,05 der having a fuel inlet and exhaust ports arranged below the upper or working face of 'the piston in the uppermost position of said piston and the cylindrical valve having a port which is periodically brought into reg- Mo 'ister with the respective inlet and exhaust ports, during the rotation of said valve, and which is covered by the piston at least at the moment of ignition.

2. In an internal combustion engine, in 1115 combination, a cylinder, a piston working therein, a cylindrical valve arranged concentrically in the cylinder and in surrounding relation to the piston, and means for continuously rotating the -valve during the ma normal operation of the engine, the cylinder having fuel inlet and exhaust ports arranged below vthe upper or working face of the piston in the uppermost position of said piston and the cylindrical valve having a port ias which is periodically brought into register with therespective inlet and exhaust ports, during the rotation of said valve, and which` iscovered by the piston at least at the moment of ignition, the piston having a lateral 'lao establishes communication between the port nesses. of the valve and the combustionchamber of recess which opens to its upper face sind my hand in presence of tivo subscribing Witt a cylinder at the ince tion of the suction ANDR LON PIERRE GURET' 5 stroke and at the comp etion of the exhaust. Witnesses:

stroke. HANsoN C. COXF,

In testimony whereof I have hereunto set PAUL BLUM.

copies ot this patent my be obtained fof nve cents each, by addressing the Commissioner of Patenti,

Washington, D. 0." 

